What to Do When Computer Says Invalid System Disk Replace the Disk Windows 10/8/7

If you see the error message: "Invalid system disk, replace the disk and then press any key" when you boot into Windows, you can try to troubleshoot with practical solutions here. Use EaseUS data recovery software to restore data from your computer that can't boot in advance to avoid data loss.

Table of Contents

Your computer refused to boot and prompted an "Invalid system disk. Replace the disk, and then press any key" error message? This issue was commonly seen in almost all Windows versions like Windows 10/8/7/XP and frustrated a large number of users.

Here, we analyze all the possible causes that might result in an invalid system disk issue and offer the corresponding solutions. 

Workable Solutions Step-by-step Troubleshooting
First. Recover your data Create a bootable disk > boot from the bootable USB > recover files from the computer that can't boot...Full steps
Fix 1. Set first boot disk Check the boot sequence in BIOS. Go to BIOS, in the Boot tab, list the CD, removable device, or hard drive...Full steps
Fix 2. Repair MBR in WinPE You can rebuild MBR to fix invalid system disk issue. Use EaseUS Partition Master and create a WinPE...Full steps
Fix 3. Run automatic repair Try using Automatic Repair to solve invalid system disk replace the disk and press any key error...Full steps
Fix 4. Replace the hard drive If the invalid system disk error is caused by a hard drive failure, you need to replace the damaged HDD...Full steps

Important: Recover Data from Your Computer That Can't Boot in Advance

If you have any important files stored on the PC hard drive, we highly recommend you first recover data from your computer in case data loss happens while you are trying to troubleshoot the invalid system disk error.  

But how to restore files from the hard drive when the computer can't boot? Use EaseUS Data Recovery Wizard WinPE Edition to retrieve data from the computer that is dead or won't turn on. This data recovery software has a graphic user interface and lets you recover data with simple clicks.

Step 1. Create a bootable disk.

Prepare an empty USB. If you have important data on it, copy the data to another device. When you create a bootable disk, the data on the USB will be erased. EaseUS Data Recovery Wizard WinPE Edition will help you create a bootable disk. Connect the USB drive to PC, launch EaseUS Data Recovery Wizard WinPE Edition. Select the USB drive and click "Proceed" to create a bootable disk.

create a bootable disk with easeus

Step 2. Boot from the bootable USB.

Connect the bootable disk to PC that won't boot and change your computer boot sequence in BIOS. For most users, it works well when they restart their computer and press F2 at the same time to enter BIOS. Set to boot the PC from "Removable Devices" (bootable USB disk) or "CD-ROM Drive" (bootable CD/DVD) beyond Hard Drive. Press "F10" to save and exit.

Step 3. Recover files/data from a PC/laptop hard drive that won't boot.

When you boot from the USB, you can run EaseUS Data Recovery Wizard from the WinPE bootable disk. Select the drive you want to scan to find all your lost files. 

selet the drive

Click Scan to start the scanning process.

let the software scan the drive

Recover data from the computer or laptop. After the scan completed, you can preview all recoverable files, select the targeted files, and click the "Recover" button to restore your files. You'd better save all of the recovered data to another place to avoid data overwriting.

recover data from the computer

More stunning features of EaseUS Data Recovery Wizard.

EaseUS Data Recovery Wizard

  • Recover data from the recycle bin, hard drive, memory card, SD card, flash drive, digital camera, and camcorder.
  • Repair corrupted Excel, MP4, MOV, GIF, JPEG, and JPG files during data recovery.
  • Restore lost data on Windows 10/8.1/8/7/Vista/XP and Windows Server 2019 - 2003.

How to Fix Invalid System Disk Replace the Disk Error in Windows 10

After you've restored the files, you can begin to solve the invalid system disk error safely. 

Fix 1. Set a Bootable Disk as the First Boot Disk

After data recovery, you can start taking measures to fix invalid system disk error to make the PC boot and work properly. If you want to boot from the internal hard disk, unplug any USB flash drive, external hard drive, CD, or floppy disk. And if you want to boot from a removable disk, make sure it is bootable and has set as the first boot disk.

To change the boot order, just go to BIOS, in the Boot tab, list the CD, removable device, or hard drive first. Finally, save the settings and exit. 

Change the boot order to fix invalid system disk error

Fix 2. Repair Master Boot Record

A corrupted Master Boot Record is one of the reasons for the appearance of an invalid system disk error. To exclude this factor, try EaseUS partition software to rebuild MBR in the WinPE environment. 

Step 1. Create a WinPE bootable disk.

  • Download and launch EaseUS Partition Master on a new PC which runs the same system as yours.
  • Click "WinPE Creator" on the toolbar. And select to create the bootable disk on a USB drive. If your computer has a CD/DVD drive, you can also create the bootable disk to CD/DVD.
  • Click "Proceed" to finish the process.
create a bootable disk

Step 2. Rebuild MBR.

  • Connect the bootable USB or CD/DVD to your PC.
  • Press "Del" when you are restarting the computer. Boot your computer from "Removable Devices" or "CD-ROM Drive". And then EaseUS Partition Master will run automatically.
  • Right-click the disk whose MBR is damaged. Choose "Rebuild MBR" to continue.
rebuild MBR
  • Select the type of MBR with the current operating system. Then, click "OK".
rebuild MBR
  • Click the "Execute 1 Operation" button at the top-left corner and click "Apply" to build the MBR. After that, your computer can boot normally again.
rebuild MBR

Fix 3. Perform an Automatic Repair

If the above methods don't work, you can try performing the Automatic Repair or Start-up Repair to solve the "invalid system disk replace the disk and press any key" error.

Step 1. Insert the Windows bootable drive and boot from it.

Step 2. When you access the Windows Boot Options menu, go to "Troubleshoot > Advanced Boot Options", select "Automatic Repair" and follow the wizard instructions to complete the process.

Perform an Automatic Repair to fix invalid system disk error

Fix 4. Replace Hard Drive with Invalid System Disk Error

If none of the methods helps, I am afraid you have encountered a hard drive failure issue and you have to replace a hard drive and reinstall Windows to fix the invalid system disk error in Windows 10/8/7.

How to Fix Invalid System Disk Replace the Disk and Then Press Any Key

When the invalid system disk, replace the disk problem arise, first you need to ensure data security by using professional data recovery software to export the data and then try to solve the problem later.

Go to the BIOS interface and check whether the system hard drive is detected or not. If the master boot record is corrupted, use Fix 2 to resolve the issue. Besides, running an automatic repair might be helpful. If it is a hard drive failure that leads to the invalid system disk error, you can look for help from the hard drive manufacturer for replacement.

See More Related Topics About Invalid System Disk Windows 10

If you also have any of the following frequently asked questions about invalid system disk replace the disk issue, find solutions here.

What is a common cause of the invalid system disk error?

The causes could be various, including but not limited to the following reasons:

  • The boot disk is not set correctly.
  • Your hard disk might be infected by a virus.
  • The master boot record of the system drive is corrupted.
  • Your hard drive could be physically damaged.

How do I fix disk boot failure?

There are a few solutions to help you remove the Windows disk boot failure error:

  • Change boot order
  • Repair the operating system
  • Fix by running CHKDSK to repair the corrupted file system
  • Remove installed hardware

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Updated by Daisy

Daisy is the Senior editor of the writing team for EaseUS. She has been working in EaseUS for over ten years, starting from a technical writer to a team leader of the content group. As a professional author for over 10 years, she writes a lot to help people overcome their tech troubles.

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Written by Roxanne

Roxanne is one of the main contributors to EaseUS and has created multiple posts on digital devices like PCs, Mobile phones, tablets, Mac, etc. She loves to share ideas with people of the same interest.

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